MAIN CHARACTERISTICS range MERTEN SYSTEM M range of product MERTEN SYSTEM M aesthetic name M-ARC product or component type ROCKER WITH INDICATOR colour tint ALUMINIUM wiring device additional information WITH LIGHTING WINDOW market segment RESIDENTIAL COMPLEMETARY CHARACTERISTICS product destination SINGLE SWITCH material POLYCARBONATE MATT surface treatment VARNISHED marking WITH SYMBOLS marking location MARKING ON LEGEND HOLDER fixing mode BY CLAMP